CN116370843A - Laser positioning system calibration device, calibration system and calibration method - Google Patents
Laser positioning system calibration device, calibration system and calibration method Download PDFInfo
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- CN116370843A CN116370843A CN202211697030.3A CN202211697030A CN116370843A CN 116370843 A CN116370843 A CN 116370843A CN 202211697030 A CN202211697030 A CN 202211697030A CN 116370843 A CN116370843 A CN 116370843A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
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- A—HUMAN NECESSITIES
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- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/105—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using a laser alignment system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
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- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1075—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus
- A61N2005/1076—Monitoring, verifying, controlling systems and methods for testing, calibrating, or quality assurance of the radiation treatment apparatus using a dummy object placed in the radiation field, e.g. phantom
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Abstract
The application provides a laser positioning system calibration device, a calibration system and a calibration method, wherein the calibration method comprises the following steps: calibrating devices are respectively arranged in the first chamber and the second chamber; the calibration device comprises a calibration die body, wherein the relative position between the calibration die body of the first chamber and a preset center point of the first chamber is the same as the relative position between the calibration die body of the second chamber and the preset center point of the second chamber; the position of the first positioning mark on the calibration phantom of the first chamber is compared to the position of the second positioning mark on the calibration phantom of the second chamber. According to the technical scheme, the problem that the irradiation position of the patient deviates from the correct treatment position due to the fact that the first laser positioning system of the first chamber and the second laser positioning system of the second chamber are inconsistent can be avoided, and unnecessary radiation dose of the patient is reduced or avoided.
Description
Technical Field
The application relates to the technical field of medical treatment, in particular to a laser positioning system calibration device, a laser positioning system calibration system and a laser positioning system calibration method.
Background
With the development of atomic science, radiation therapy such as cobalt sixty, linac, electron beam, etc. has become one of the main means for cancer therapy. However, conventional photon or electron therapy is limited by the physical conditions of the radiation itself, and damages a large number of normal tissues on the beam path while killing tumor cells.
In order to reduce radiation damage to normal tissue surrounding a tumor, the concept of target treatment in chemotherapy (chemotherapy) has been applied to radiotherapy; for tumor cells with high radiation resistance, radiation sources with high relative biological effects (relative biological effectiveness, RBE) such as proton therapy, heavy particle therapy, neutron capture therapy, etc. are also actively developed. The neutron capture treatment combines the two concepts, such as boron neutron capture treatment, and provides better cancer treatment options than traditional radioactive rays by means of the specific accumulation of boron-containing drugs in tumor cells and the combination of accurate neutron beam irradiation.
Radiation therapy systems typically include a plurality of active volumes, including imaging, irradiation, and preparation chambers, among others. If the irradiation room is a room for irradiating neutron beams to the patient for treatment, the irradiation room is provided with a laser emitter for emitting laser beams to position the patient for treatment; the preparation room is a room for performing preparation work required before irradiating the neutron beam to the patient, and is provided with a laser emitter to emit a laser beam to perform analog positioning of the patient.
The positioning-related layout, structural arrangement in the irradiation chamber and the preparation chamber are substantially similar, both with a laser positioning system, collimators and treatment couch.
In which the laser positioning system typically comprises a plurality of laser transmitters fixedly mounted to the walls and ceiling of the preparation/irradiation room, respectively, that is, the irradiation room and the walls of the preparation room each have the same relative position of the laser transmitters. By setting positioning marks for multiple exposures of the patient in the preparation room and the exposure room, it is ensured that the tumor target area of the patient coincides with the isocenter position of the analogue positioner (in the preparation room) or the radiotherapy machine (in the exposure room).
However, the laser positioning system is subject to environmental, human or temperature differences during use to create deviations that result in inconsistent isocenter positions indicated by the laser positioning system in the preparation room and the irradiation room, thereby causing the irradiation position of the radiation therapy apparatus to the patient to deviate from the correct treatment position. The patient is treated in this condition by sitting, which corresponds to the patient moving in body during treatment. In this case, the patient suffers from poor treatment effect and receives an increased unnecessary radiation dose compared to the correct treatment position. Therefore, it is important to calibrate the accuracy of the laser positioning system periodically.
Disclosure of Invention
In view of this, the present application provides a calibration device, a calibration system and a calibration method for a laser positioning system, so as to solve the problem that in the prior art, the irradiation position of a radiation therapy apparatus to a patient deviates from the correct treatment position due to the inconsistent isocenter positions indicated by the laser positioning systems of the first chamber and the second chamber.
To achieve the above object, the present application provides a laser positioning system calibration method, the method including:
calibrating devices are respectively arranged in the first chamber and the second chamber; the calibration device comprises a calibration die body, wherein the relative position between the calibration die body of the first chamber and a preset center point of the first chamber is the same as the relative position between the calibration die body of the second chamber and the preset center point of the second chamber;
comparing the position of the first positioning mark on the calibration phantom of the first chamber with the position of the second positioning mark on the calibration phantom of the second chamber; the first positioning mark is a positioning mark formed on the calibration die body by laser emitted by a first laser positioning system of the first chamber, and the second positioning mark is a positioning mark formed on the calibration die body by laser emitted by a second laser positioning system of the second chamber.
Optionally, the method further comprises:
and if the position of the first positioning mark on the calibration die body and/or the position of the second positioning mark on the standard die body have deviation, adjusting the first laser positioning system and/or the second laser positioning system based on the deviation.
Optionally, the calibration device further comprises a support frame;
the setting calibration device includes: installing the supporting frame, and setting the calibration die body at a preset position of the supporting frame.
Optionally, the supporting frame comprises a mounting frame and a supporting plate, wherein the supporting plate is arranged on the mounting frame and used for supporting the calibration die body;
the method for installing the support frame comprises the following steps: and installing the installation frame at a preset position of the second chamber or the first chamber, and adjusting the angle and/or the height of the supporting plate relative to the installation frame.
Optionally, a first scale in a first direction and a second scale in a second direction perpendicular to the first direction are arranged on the supporting plate;
the setting of the calibration phantom at a preset position of the support frame includes: and placing the calibration die body at a preset scale position on the supporting plate according to the first scale and the second scale.
Optionally, the support frame is installed in the first chamber and the second chamber and adjusted to be horizontal, and the calibration die body in the first chamber and the second chamber is placed at the preset scale position.
Optionally, the calibration module is provided with a reference mark.
Another aspect of the present application provides a calibration device for calibrating a laser positioning system, the calibration device for mounting in a first chamber having a first laser positioning system and/or a second chamber having a second laser positioning system;
the calibration means may comprise a calibration phantom,
when the first chamber is provided with the calibration device, the laser emitted by the first laser positioning system forms a first positioning mark on the calibration die body, and when the second chamber is provided with the calibration device, the laser emitted by the second laser positioning system forms a second positioning mark on the calibration die body, and the consistency of the first laser positioning system and the second laser positioning system is judged and determined according to the position of the first positioning mark on the calibration die body and the position of the second positioning mark on the calibration die body.
Optionally, the support frame is used for being installed in the first chamber or the second chamber, and the calibration die body is used for being arranged on the support frame.
Optionally, the support frame comprises a mounting frame for mounting and a support plate arranged on the mounting frame, and the calibration die body is optionally arranged on the support plate;
wherein the angle and/or the height of the supporting plate relative to the mounting frame are/is adjustable;
the support plate is provided with a first scale in a first direction and a second scale in a second direction perpendicular to the first direction, and the calibration die body is arranged at a preset scale position in the support plate according to the first scale and the second scale.
Optionally, the mounting frame is provided with an adjusting structure located below the supporting plate, the lower surface of the supporting plate is provided with a positioning structure matched with the adjusting structure, and the angle and/or the height of the supporting plate relative to the mounting frame can be adjusted by adjusting the adjusting structure. Wherein the adjustment structure is optionally provided as an adjustment bolt and the positioning structure is correspondingly provided as a positioning hole.
Optionally, the calibration module is provided with a reference mark.
According to another aspect of the present application there is also provided a calibration system comprising a first chamber provided with a first laser positioning system, a second chamber provided with a second laser positioning system and a calibration device as described above;
the calibration device is respectively arranged in the first chamber and the second chamber, when the relative position between the calibration die body of the first chamber and the preset center point of the first chamber is the same as the relative position between the calibration die body of the second chamber and the preset center point of the second chamber, the position of the first positioning mark on the calibration die body is compared with the second positioning mark of the second positioning mark on the calibration die body, so that the consistency of the first laser positioning system and the second laser positioning system is judged and determined; the first positioning mark is a positioning mark formed on the calibration die body of the first chamber by the laser emitted by the first laser positioning system, and the second positioning mark is a positioning mark formed on the calibration die body of the second chamber by the laser emitted by the second laser positioning system.
Optionally, the first chamber and the second chamber are respectively provided with a collimator and a collimator mounting structure for mounting the collimator, and the support frame of the calibrating device is mounted on the collimator mounting structure;
the preset center points of the first chamber and the second chamber correspond to the position relation of the collimator, and the space dimensions are completely consistent.
In the technical scheme provided by the application, whether the first laser positioning system and the second laser positioning system have offset can be determined by comparing the first positioning mark formed on the calibration die body by the first laser positioning system of the first chamber and the second positioning mark formed on the calibration die body by the second laser positioning system of the second chamber, so that the problem that the patient treatment effect is poor and unnecessary radiation dose is caused by the fact that the irradiation position of the radiotherapy machine of the second chamber deviates from the correct treatment position is avoided.
Additional features and advantages of the present application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:
FIG. 1 is a schematic view of a structure in which calibration means are provided in a first chamber and a second chamber, respectively, according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a first collimator and a first laser positioning system disposed in a first chamber in one embodiment;
FIG. 3 is a schematic diagram of a configuration of a second collimator and a second laser positioning system disposed in a second chamber in one embodiment;
FIG. 4 is a schematic diagram of a calibration device according to one embodiment of the present invention;
FIG. 5 is a schematic view of the calibration device of FIG. 4 from one side;
fig. 6 is a schematic view of the support plate provided with graduations.
Description of the reference numerals
100-a first chamber; 101-a first collimator; 102-a first laser transmitter; 200-a second chamber; 201-a second collimator; 202-a second laser transmitter; 1-calibrating a die body; 2-supporting frames; 21-a support plate; 22-mounting frame; 23-support bolts.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. In the case of no conflict, the present application, embodiments and features of the embodiments may be controlled in combination with each other.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application. In addition, "inner and outer" refer to inner and outer with respect to the outline of each component itself.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
The radiation therapy system includes a first room 100 and a second room 200, as shown in fig. 1, the first room 100 may be a preparation room, which is a room for preparation before a neutron beam is irradiated to a patient, the preparation work including fixing the patient to a treatment table, positioning a tumor of the patient, making a three-dimensional positioning mark, and the like. The second chamber 200 may be an irradiation chamber, and is a room for irradiating a neutron beam to a patient for treatment. The preparation chamber 100 is preferably provided at one side of the irradiation chamber 200 with an access port for patient access and a door for opening or closing the access port therebetween. The charged particle generation chamber 300 generates a charged particle beam by the charged particle generation unit 301, forms a therapeutic neutron beam after a series of reactions and decelerations, and emits the therapeutic neutron beam from the second collimator 201 of the irradiation chamber 200 to a tumor site of a patient.
The first chamber and the second chamber include, but are not limited to, a preparation chamber or an irradiation chamber, and can be space with other functions which need to be aligned in the actual treatment and preparation process.
As shown in fig. 2 and 3, a first laser positioning system is disposed in the preparation room 100, and the first laser positioning system includes a plurality of first laser transmitters 102 disposed on a top wall and each side wall of the preparation room 100, respectively, for transmitting laser beams for performing analog positioning on a patient. A first collimator 101 is also provided in the preparation chamber 100 on a side wall, and the first collimator 101 is used as a positioning reference analog collimator and is identical in structure, size and position to the second collimator 201 in the irradiation chamber 200.
A second laser positioning system is disposed within the irradiation chamber 200, and the second laser positioning system includes a plurality of second laser emitters 202 disposed on a top wall and each side wall of the irradiation chamber 200, respectively. A second collimator 201 for emitting a therapeutic neutron beam is further provided on one side wall in the irradiation chamber 200.
In combination with an affected part image obtained by a patient in an imaging mode such as a CT image, the tumor part is positioned in the preparation room 100 through each first laser emitter 102 of the first laser positioning system, and after positioning marks are made on the body surface of the patient, the tumor part enters the irradiation room 200, and in the irradiation room 200, the positioning marks made on the body surface of the patient in advance by the laser emitted by each second laser emitter 202 of the second laser positioning system are aligned and positioned, so that neutron beams can be aligned to the tumor part for irradiation. Specific labeling methods and positioning methods are well known to those of ordinary skill in the art and are not described in detail herein.
Preferably, the positional relationship between each of the first laser emitters 102 and the first collimator 101 in the preparation room 100 is required to be set to be the same as the positional relationship between each of the second laser emitters 202 and the second collimator 201 in the irradiation room 200, respectively. Of course, the actual size of the preparation chamber 100 may be smaller than that of the irradiation chamber 200, so that the preset center points of the preparation chamber 100 and the irradiation chamber 200 have the same positional relationship with respect to the respective collimators, that is, the absolute spatial dimensions of the preset center points of the preparation chamber 100 and the irradiation chamber 200 are completely consistent, and the collimator is completely consistent in the vertical, horizontal and front-back dimensions, so that the mid-beam is irradiated in alignment with the tumor site. Specifically, the center point M of the first collimator 101 is used as a reference point in the preparation chamber 100, and the center point N of the second collimator 201 is used as a reference point in the irradiation chamber 200. Preferably, the coordinate values of each first laser emitter 101 need to be the same as the coordinate values of each second laser emitter 201 in a one-to-one correspondence. The intersection points obtained by the intersection of the laser planes emitted by the first laser transmitters 101 are located on the outlet axis of the first collimator 101, the intersection points obtained by the intersection of the laser planes emitted by the second laser transmitters 201 are located on the outlet axis of the second collimator 201, and the absolute positions of the laser intersection points of the first laser transmitters 101 and the central point M and the absolute positions of the laser intersection points of the second laser transmitters 201 and the central point N are completely consistent.
For this reason, the first laser positioning system and the second laser positioning system need to be calibrated, so that the two positions can be in one-to-one correspondence, so that when the two positions deviate, the treatment position indicated by the second laser positioning system deviates from the correct treatment position, and thus the patient does not achieve the preset treatment effect and receives unnecessary radiation dose.
The application provides a laser positioning system calibration method, which comprises the following steps:
as shown in fig. 1, calibration means are provided in the preparation chamber 100 and the irradiation chamber 200, respectively; wherein the calibration device comprises a calibration phantom 1, and the relative position between the calibration phantom 1 of the preparation chamber 100 and the preset center point of the preparation chamber 200 is the same as the relative position between the calibration phantom 1 of the irradiation chamber 200 and the preset center point of the irradiation chamber 200; the preset center point of the preparation room 200 may be the center point M of the projection of the first collimator 101 on the wall surface, and correspondingly, the preset center point of the irradiation room 200 is the center point N of the projection of the second collimator 201 on the wall surface. Of course, the preset center points of the preparation room 100 and the irradiation room 200 may also be other preset points corresponding to each other, for example, a certain reference point of the treatment table for positioning the patient.
Then, the positions of the first positioning marks on the calibration phantom 1 of the preparation chamber 100 and the positions of the second positioning marks on the calibration phantom 1 of the irradiation chamber 200 are compared; wherein the first positioning mark is a positioning mark formed on the calibration phantom 1 by the laser emitted by the first laser positioning system of the preparation chamber 100, and the second positioning mark is a positioning mark formed on the calibration phantom 1 by the laser emitted by the second laser positioning system of the irradiation chamber 200.
Wherein the first and second positioning marks may be cross-hair marks or points of the emitted laser light formed on the surface of the calibration phantom 1, without limitation.
The calibration device may be provided in the preparation chamber 100 and the irradiation chamber 200, respectively, and the calibration device may be provided in the preparation chamber 100, and then the position of the first positioning mark formed on the calibration phantom 1 may be identified, and then the calibration device may be placed in the irradiation chamber 200, and the second positioning mark formed in the irradiation chamber may be compared with the identification of the first positioning mark, that is, the calibration device used in the preparation chamber 100 and the irradiation chamber 200 may be the same calibration device. Two identical sets of calibration devices may be used in the preparation chamber 100 and the irradiation chamber 200, i.e., a first calibration device may be provided in the preparation chamber 100 and a second calibration device may be provided in the irradiation chamber 200.
The laser positioning system calibration method further comprises the following steps:
if there is a deviation in the position of the first positioning mark on the calibration phantom 1 and the position of the second positioning mark on the standard phantom 1, indicating that the first laser positioning system of the preparation chamber 100 is not identical to the second laser positioning system of the irradiation chamber 200, the first laser positioning system and/or the second laser positioning system may be adjusted according to the positional relationship of the first positioning mark and the second positioning mark on the calibration phantom 1 based on the deviation. The position and angle of the laser line projection and the focal power of the laser line can be specifically adjusted so that the intersection point of the laser planes of the first laser positioning system of the preparation room 100 and the second laser positioning system of the irradiation room 200 is as consistent as possible.
If the positions of the first positioning marks on the calibration phantom 1 and the positions of the second positioning marks on the standard phantom 1 are identical in one-to-one correspondence and the dimensions are identical, the first laser positioning system of the preparation chamber 100 and the second laser positioning system of the irradiation chamber 200 are identical, and no adjustment is required.
In one embodiment, as shown in fig. 4 and 5, the calibration device further comprises a support frame 2. The method for setting the calibration device comprises the following steps: and installing the support frame 2, and setting the calibration die body 1 at a preset position of the support frame 2. Preferably, the support frame 2 may be mounted on a collimator mounting structure, the first collimator 101 in the preparation room 100 and the second collimator 201 in the irradiation room 200 are both wall-mounted by the collimator mounting structure, the support frame 2 may also be mounted on the collimator mounting structure (of course, may be mounted on other structures), and the connection of the support frame 2 to the collimator mounting structure includes, but is not limited to, bolting, hinging, and the like.
Further, the support frame 2 comprises a mounting frame 22 and a support plate 21 mounted on the mounting frame 22 and used for supporting the calibration phantom 1; wherein, the liquid crystal display device comprises a liquid crystal display device,
the method for installing the support frame 2 comprises the following steps: the mounting frame 22 is installed at a predetermined position of the irradiation chamber 200 or the preparation chamber 100, and the angle and/or the height of the support plate 21 with respect to the mounting frame 22 are adjusted.
Specifically, an angle and/or height adjusting structure is provided on the mounting frame 22, such as an adjusting bolt 23 located below the supporting plate 21, a positioning hole matched with the adjusting bolt 23 is provided on the lower surface of the supporting plate 21, as shown in fig. 5, the angle and/or height of the supporting plate 21 relative to the mounting frame 2 can be adjusted by rotating the adjusting bolt 23, and a level meter can be used to detect the levelness of the supporting plate 21 during the process of adjusting the supporting plate 21, so as to ensure that the supporting plate 21 is horizontally installed, and the calibration die body is in a horizontal plane when the calibration die body is set.
In the present embodiment, the support plate 21 of the support frame 2 is provided with a first scale in a first direction and a second scale in a second direction perpendicular to the first direction.
The method for setting the calibration phantom 1 at the preset position of the support frame 2 comprises the following steps: the calibration phantom 1 is placed at a preset scale position on the support plate 21 according to the first scale and the second scale. As shown in fig. 6, a position indicated by a broken line is a position where the calibration phantom 1 is placed, which is determined based on coordinates in two vertical directions, and then the calibration phantom 1 can be quickly and accurately placed at this position.
When the support plates 21 of the support frame 2 in the irradiation chamber 200 and the preparation chamber 100 are at the same height and in the horizontal position, and the calibration phantom 1 is at the same scale position on the support plates 21, it is possible to ensure that the relative positions of the calibration phantom 1 in the irradiation chamber 200 and the preparation chamber 100 with respect to the preset center point are identical, that is, the coordinate values of the calibration phantom in the preparation chamber 100 with respect to the preset center point are identical with the coordinate values of the calibration phantom 1 in the irradiation chamber 100 with respect to the preset center point.
Preferably, the calibration module 1 is provided with reference marks, such as fiducial lines, graduations, etc. of multiple dimensions, and preferably the reference marks are aligned with graduations on the support plate. The arrangement is favorable for being more accurate and convenient in comparison when different spaces aim at laser lines, and the visibility is improved.
According to another aspect of the present application, there is also provided a calibration device for calibrating a laser positioning system, the calibration device being for mounting in a preparation chamber 100 having a first laser positioning system or an irradiation chamber 200 having a second laser positioning system;
the calibration device comprises: a support frame 2 and an alignment phantom 1, wherein the support frame 2 is used for being installed at a preset position of the preparation chamber 100 or the irradiation chamber 200, and the alignment phantom 1 is used for being arranged on the support frame 2;
when the calibration device is installed in the irradiation chamber 200, the laser light emitted by each first laser emitter 101 of the first laser positioning system forms a first positioning mark on the calibration phantom 1, and when the calibration device is installed in the irradiation chamber 200, the laser light emitted by each second laser emitter 201 of the second laser positioning system forms a second positioning mark on the calibration phantom 1, and the consistency of the first laser positioning system and the second laser positioning system is determined according to the position of the first positioning mark on the calibration phantom and the position of the second positioning mark on the calibration phantom.
If there is a deviation in the position of the first positioning mark on the calibration phantom 1 and the position of the second positioning mark on the standard phantom 1, indicating that the first laser positioning system of the preparation chamber 100 is not identical to the second laser positioning system of the irradiation chamber 200, the first laser positioning system or the second laser positioning system may be adjusted according to the positional relationship of the first positioning mark and the second positioning mark on the calibration phantom 1 based on the deviation. Specifically, the projection position, angle and focal power of the laser line of each laser module can be adjusted, so that the first laser positioning system of the preparation room 100 and the second laser positioning system of the irradiation room 200 are consistent, and the subsequent positioning accuracy is improved. If the positions of the first positioning marks on the calibration phantom 1 and the positions of the second positioning marks on the standard phantom 1 are identical in one-to-one correspondence and the dimensions are identical, the first laser positioning system of the preparation chamber 100 and the second laser positioning system of the irradiation chamber 200 are identical, and no adjustment is required.
In order to facilitate the comparison of the positions of the first positioning mark and the second positioning mark on the calibration die body, a scale or a grid can be arranged on the calibration die body 1, which is beneficial to the rapid and accurate alignment verification.
In one embodiment, the support frame 2 includes a mounting frame 22 for mounting and a support plate 21 provided on the mounting frame 22, and the calibration phantom 1 is provided on the support plate 21.
Wherein the support plate 21 has an angle and/or height adjustment structure with respect to the mounting frame 22.
The support plate 21 is provided with a first scale in a first direction and a second scale in a second direction perpendicular to the first direction, and the placement position of the calibration phantom 1 on the support plate 21 is determined based on the first scale and the second scale.
Further, the angle and/or height adjusting structure is that an adjusting bolt 23 positioned below the supporting plate 22 is arranged on the mounting frame 21, a positioning hole matched with the adjusting bolt 23 is arranged on the lower surface of the supporting plate 21, and the angle and/or height of the supporting plate 21 relative to the mounting frame 22 can be adjusted by rotating the adjusting bolt 23.
Another aspect of the present application also provides a calibration system comprising a preparation chamber 100 provided with a first laser positioning system, an irradiation chamber 200 provided with a second laser positioning system, and a calibration device as above.
When the preparation chamber 100 and the irradiation chamber 200 are respectively provided with a calibration device, and the relative position between the calibration die body 1 of the preparation chamber 100 and the preset center point of the preparation chamber 100 is the same as the relative position between the calibration die body 1 of the irradiation chamber 200 and the preset center point of the irradiation chamber 200, the position of the first positioning mark on the calibration die body 1 of the preparation chamber 100 and the second positioning mark on the calibration die body 1 of the irradiation chamber 200 are compared, so that the consistency of the first laser positioning system and the second laser positioning system is determined; the first positioning mark is a positioning mark formed on the calibration phantom 1 of the preparation chamber 100 by the laser emitted by the first laser positioning system, and the second positioning mark is a positioning mark formed on the calibration phantom 1 of the irradiation chamber 200 by the laser emitted by the second laser positioning system.
In one embodiment, the preparation chamber 100 and the irradiation chamber 200 are provided with a collimator and a collimator mounting structure to which the collimator is mounted, respectively, and the support frame 2 of the collimator device is mounted on the collimator mounting structure. The connection and adjustment of the support frame 2 to the collimator mounting structure is described above. Preferably, the first collimator 101 in the preparation chamber 100 and the second collimator 201 in the irradiation chamber 200 may have a consistent quick-assembly structure, so that the calibration device can be quickly and accurately loaded, and the spatial positions of the calibration device relative to the respective collimators in the two spaces are consistent.
The preset center point is the center point of the projection of the collimator on the wall surface, that is, the center point M of the projection of the first collimator 101 on the wall surface of the preparation room 100 is selected as the preset center point, and the center point N of the projection of the second collimator 201 on the wall surface of the irradiation room 200 is selected as the preset center point. Of course, the above-described center points M and N are not limited, and other points corresponding to each other in the preparation chamber 100 and the irradiation chamber 200 may be selected as the preset center points, so long as the preparation chamber 100 and the irradiation chamber 200 have the same reference base point.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A calibration device for calibrating a laser positioning system, characterized in that the calibration device is adapted to be mounted in a first chamber with a first laser positioning system and/or in a second chamber with a second laser positioning system;
the calibration means may comprise a calibration phantom,
when the first chamber is provided with the calibration device, the laser emitted by the first laser positioning system forms a first positioning mark on the calibration die body, and when the second chamber is provided with the calibration device, the laser emitted by the second laser positioning system forms a second positioning mark on the calibration die body, and the consistency of the first laser positioning system and the second laser positioning system is judged and determined according to the position of the first positioning mark on the calibration die body and the position of the second positioning mark on the calibration die body.
2. The calibration device of claim 1, further comprising a support frame for mounting in the first chamber or the second chamber, the calibration phantom being for placement on the support frame.
3. The calibration device of claim 2, wherein the support frame comprises a mounting frame and a support plate disposed on the mounting frame, the calibration phantom being selectively disposed on the support plate;
wherein the angle and/or the height of the supporting plate relative to the mounting frame are/is adjustable.
4. A calibration device according to claim 3, wherein the support plate is provided with a first scale in a first direction and a second scale in a second direction perpendicular to the first direction, the calibration phantom being arranged at a preset scale position on the support plate according to the first and second scales.
5. A calibration device according to claim 3, wherein the mounting frame is provided with an adjustment structure located below the support plate, the lower surface of the support plate is provided with a positioning structure cooperating with the adjustment structure, and the angle and/or the height of the support plate relative to the mounting frame can be adjusted by adjusting the adjustment structure.
6. The calibration device of claim 4, wherein the calibration module is provided with a reference mark.
7. A calibration system, characterized in that it comprises a first chamber provided with a first laser positioning system, a second chamber provided with a second laser positioning system and a calibration device according to claim 7;
the first chamber and the second chamber are provided with the calibration device, when the relative position between the calibration die body of the first chamber and the preset center point of the first chamber is the same as the relative position between the calibration die body of the second chamber and the preset center point of the second chamber, the position of the first positioning mark on the calibration die body is compared with the second positioning mark of the second positioning mark on the calibration die body, so that the consistency of the first laser positioning system and the second laser positioning system is judged and determined; the first positioning mark is a positioning mark formed on the calibration die body of the first chamber by the laser emitted by the first laser positioning system, and the second positioning mark is a positioning mark formed on the calibration die body of the second chamber by the laser emitted by the second laser positioning system.
8. The alignment system of claim 7, wherein the first and second chambers are each provided with a collimator and a collimator mounting structure on which the support frame of the alignment device is mounted;
the preset center points of the first chamber and the second chamber correspond to the position relation of the collimator, and the space dimensions are completely consistent.
9. A method of calibrating a laser positioning system, the method comprising:
calibrating devices are respectively arranged in the first chamber and the second chamber; the calibration device comprises a calibration die body, wherein the relative position between the calibration die body of the first chamber and a preset center point of the first chamber is the same as the relative position between the calibration die body of the second chamber and the preset center point of the second chamber;
comparing the position of the first positioning mark on the calibration phantom of the first chamber with the position of the second positioning mark on the calibration phantom of the second chamber; the first positioning mark is a positioning mark formed on the calibration die body by laser emitted by a first laser positioning system of the first chamber, and the second positioning mark is a positioning mark formed on the calibration die body by laser emitted by a second laser positioning system of the second chamber.
10. The laser positioning system calibration method of claim 9, further comprising:
and if the position of the first positioning mark on the calibration die body and/or the position of the second positioning mark on the standard die body deviate, adjusting the first laser positioning system and/or the second laser positioning system.
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| CN2021116604923 | 2021-12-30 | ||
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| CN202223514632.9U Active CN219847875U (en) | 2021-12-30 | 2022-12-28 | Laser positioning calibration device, calibration system and neutron capture treatment system |
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| CN208355948U (en) * | 2017-12-18 | 2019-01-11 | 南京中硼联康医疗科技有限公司 | Neutron capture treatment system |
| CN109925612A (en) * | 2017-12-18 | 2019-06-25 | 南京中硼联康医疗科技有限公司 | Neutron capture treatment system |
| CN113827876A (en) * | 2020-06-08 | 2021-12-24 | 中硼(厦门)医疗器械有限公司 | Working procedure of radiation therapy system and irradiation parameter verification device |
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